﻿//  Copyright 2016 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using System;
using System.Runtime.InteropServices;

namespace NtCoreLib;

#pragma warning disable 1591

/// <summary>
/// Compression format for RtlDecompressBuffer.
/// </summary>
[Flags]
public enum RtlCompressionFormat : short
{
    None = 0,
    Default = 1,
    LZNT1 = 2,
    XPRESS = 3,
    XPRESS_HUFF = 4,
    Maximum = 0x100,
    Hiber = 0x200
}

public static partial class NtRtl
{
    [DllImport("ntdll.dll")]
    public static extern int RtlNtStatusToDosError(NtStatus status);

    [DllImport("ntdll.dll")]
    public static extern int RtlNtStatusToDosErrorNoTeb(NtStatus status);

    [DllImport("ntdll.dll")]
    public static extern NtStatus RtlGetLastNtStatus();

    [DllImport("ntdll.dll")]
    public static extern NtStatus RtlGetCompressionWorkSpaceSize(
      RtlCompressionFormat CompressionFormatAndEngine,
      out int CompressBufferWorkSpaceSize,
      out int CompressFragmentWorkSpaceSize
    );

    [DllImport("ntdll.dll")]
    public static extern NtStatus RtlCompressBuffer(
      RtlCompressionFormat CompressionFormatAndEngine,
      [In] byte[] UncompressedBuffer,
      int UncompressedBufferSize,
      [Out] byte[] CompressedBuffer,
      int CompressedBufferSize,
      int UncompressedChunkSize,
      out int FinalCompressedSize,
      byte[] WorkSpace
    );

    [DllImport("ntdll.dll")]
    public static extern NtStatus RtlDecompressBuffer(
      RtlCompressionFormat CompressionFormat,
      [In] byte[] UncompressedBuffer,
      int UncompressedBufferSize,
      [Out] byte[] CompressedBuffer,
      int CompressedBufferSize,
      out int FinalUncompressedSize
    );

    [DllImport("ntdll.dll")]
    public static extern NtStatus RtlDecompressBufferEx(
      RtlCompressionFormat CompressionFormat,
      [In] byte[] UncompressedBuffer,
      int UncompressedBufferSize,
      [Out] byte[] CompressedBuffer,
      int CompressedBufferSize,
      out int FinalUncompressedSize,
      byte[] WorkSpace
    );
}
#pragma warning restore 1591

